feat: add KeyMap with defaults and INI overrides

Maps key sequences to action name strings, with hardcoded vim-style
defaults and QSettings-based [keys] overrides. Unknown actions and
unparseable sequences are collected as warnings rather than treated
as fatal, so a typo in the config cannot silently misbind or crash.

Note: QKeySequence::fromString() on Qt 6.11 does not return an empty
sequence for unparseable input (e.g. "NotAKey++") -- it returns a
non-empty sequence whose toString() is empty. Detection uses that
instead of isEmpty().

0 files changed, 0 insertions, 0 deletions